I have to assume that the structure in question was built by Freightliner. The pictures and original repair request went to Fleetwood. Fleetwood in turn informed me that that would fall under the Freightliner warranty.
The following is the email response I received from Freightliner after submitting the pictures and repair request to them:
"I am showing and inservice date on your chassis of 5/30/14, you had
corrosion coverage of 6mths on your chassis. This would not be covered by
your warranty at this time."
But just to be sure, I have sent an inquiry to Freightliner asking for clarification on who actually built that framework.
In any event, I am still very disappointed in Freightliner's corrosion warranty.
